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Патент USA US2120010

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June 7, 1938’.
Filed Sept. 29, 1934
3 Sheets-Sheet l
,_ .
wumem'm was
$110k“ w
June 7, 1938..
Filed Sept. 29, 1934
5 Sheets-Sheet 2
June 7, 1938.
Filed Sept. 29, 1934
3 Sheets-Sheet 3
"-53.5 ‘
£79, 7
23 ‘Y
(3 W
Patented June 7, 1938
Wilhelm Thaler, Heidenheim-on-the-Brenz, Ger
many, assignor to American Voith Contact Co.,
Inc., New York, N. Y., a corporation of New
Application September 29, 1934, Serial No. 746,202
In Germany October 6, 1933
3 Claims.
This invention relates to control and regula
tor means for actuating mechanisms such, for
(Cl. 121—38)
against the edge of the wire, the counter-action
is so carried out that the movable slide bearing
example, as mechanisms on governors, or, for
of the wire guide roll will be connected with the
example, to obtain proper straight running of re
jet nozzle in such a manner that the latter makes
5 volving wires, bands or felts of the kind employed.
in paper-making or similar machines.
In many of the governor systems in use, the
impulses are frequently transmitted pneumati
cally to ratchet mechanisms which enlarge the
10 impulses and cause the desired actuation of gates,
valves and the like. Such a pneumatic transmis
sion of regulating impulses can, for instance, be
accomplished through the instrumentality of a
feeler device which is associated with the part
15 to be governed and cooperates with a control noz
zle or the like under the influence of either com
pressed air or a vacuum. Pressure changes in
the nozzle are caused to actuate and control pis
tons which in turn actuates a ratchet and pawl
a movement opposite to that of the Wire to be
regulated. Analogously, in a felt regulator in
which the regulating impulse is caused by an air
current, the free exit of which from a feeler is
more or less obstructed by the felt edge, the mov
able slide bearing of the felt guide roll can, by ’
suitable means, be connected in such a manner
that the feeler will execute a movement opposite
to the movement of the felt.
The nature of the invention, its general prin
ciples and objects above referred to, as well as 15
other objects and advantages, and the manner in
which the new and novel features of construction
and operation may be embodied in practical form,
and means for the functions and accomplishment
20 mechanism. A second piston may be interposed vof the results and method-herein contemplated
will be hereinafter more fully described, with ref
for operation in the air supply line to cause dis
engagement of the ratchet mechanism in case erence to the examples illustrated in the accom
of any failure in the air supply. One object and panying drawings, in which
Fig. 1 is a part sectional elevation, showing
purpose of the present invention is to combine in
25 one housing the two pistons by means of which two pistons combined in one housing, together
the ratchet wheel with its double acting pawl is with a ?oat actuated ratchet mechanism in its
neutral position;
Many constructions of wire and felt guides for
paper, board and similar machines are known.
30 In general, their regulating principle consists in
the provision of a feeler device, nozzle or the like,
Figs. 2 to 4 are similar views, showing the work
ing parts including the ratchet mechanism in
various operating positions;
which touches the revolving band when the latter
has, through some influence, deviated from a
Fig. 5 is an end elevation partly in section,
showing an arrangement in which the invention
may be employed for the regulation of a paper
straight running position. Mechanical, pneu
machine felt.
35 matic, hydraulic or electrical means are common
ly used in order to move a guide roll from its
proper or normal position at right angles to the
direction of movement of the band.
The correct
ing of such regulators is slow and sluggish inas
40 much as it requires quite some movement of the
guide roll itself in order to obtain a correctional
change of the band running over the roll. In
other words, in order to make the correctional
change, a substantial over-regulatory movement
45 of the roll is necessary. By means of the present
invention, these disadvantages have been elimi
nated by providing the regulator with a counter
acting device. This is accomplished by connect
ing the feeler device or its support with the mov
50 able bearing of the guide roll in such a manner
that it will cause the latter to execute a move
ment opposite to the sidewise movement of the
If, for instance, in a wire regulator the regu
55 lating impulse is caused by a jet of water directed
Fig. 6 is a side elevation of the same arrange
ment in connection with a regular roll for the
paper or felt-sheet; and ‘
Fig. 7 is a top plan view of the parts shown in
Fig. 6.
With more particular reference to the accom 40
panying drawings, and ?rst to Figs. 1 to 4, the
invention, for purposes of illustration is shown in
connection with a ?oat A, the movement of which
moves a pivoted lever a1 provided with a feeler 0,2,
the last named by its movement opening or clos
ing an air nozzle b1 of air piping b2 connected
with piston housing B. Through pipe 113 air is
introduced under pressure into piston housing B,
causing thereby an air arresting piston C to be
forced downward, which action results in com
pressing repositioning spring c1.
In the upper
portion of the chamber m formed in the piston
housing B is a downwardly open space or cham
ber n which is formed by the annular ?ange o,
and operatively disposed within the chamber 11
so as to close the lower open end thereof is a
b1, arresting piston C'will, even under s'mall'air "
piston- D. Through loop d1 and lever 81, piston
pressure, be forced downward against the 'pres- .
sure effect of spring 01.
D can cause the actuation of a double pawl E
and bring the same in mesh'with a ratchet Wheel
F, swinging the pawl so as'to‘engage either its
lower tooth or its upper tooth with’ the ratchet
Control piston D, by
reason of the position of rollere2 in the central
loop portion and by reason of the frictional con--,
tact between the stem v and bushing y, will not
rise immediately butrfor the time being maintains ‘
wheel accordingly as thepiston Dr is 'moved up
‘ wardly or downwardly from its neutralposition. _ its middle or neutral position. Fig. 2 illustrates
In the present instance, pawl E is centrally ' " an intermediate or changing condition in which
10 ?xed to a stub pin S rockably journaled. in a disk
the air building up in chamber 111. has attained
su?icient pressure to cause vmovement of piston
wheel W mounted for free rocking movement on
shaft T on which the ratchet wheel is ?xed. The
disk wheel W isirocked to and fro by a recipro
eating lever T1 which may be reciprocated by any
C'to its lowermost positionbut has not yet at
tained the force necessary tomove piston D up?
wardly from its neutral position. In’ this con-'
suitable mechanism. It will be observed that in
this-arrangement, the stub pin S and hence the
nection the feelerclevice a? permits some air'to
escape from nozzlerbl, not being closed there»
doubleracting pawl carried thereby moves with
against, but the amount of air permitted'to escape’
is of course less than that being introduced under
V the disk WheelW about the teeth of the ratchet
wheel on an arc concentric‘ with the central
shaft T.
pressure through the pipe 123 so that air will build j .
' up in chamber m. If, however, nozzle 171 is closed 20,.
up, as shown in Fig. 3, the air pressure in piston ‘
The loop d1 ‘comprises two. similarly down
wardly converging. slot portionsd? and (13, their
pointof convergence comprising the low central
housing B builds up to such an extentthat con; ,
trol piston D isforced upward from its middle '
position and the lower tooth of pawl'E' is thereby
brought into mesh with ratchet wheel F (Fig.3).
If, on the other hand, ?oat A rises and moves the
feeler device a2 away from the nozzle b1 was to
portion of'the loop in which the roller 22 on the
lower-‘end of the lever e1 is situated, or substan
tially situated, when the double-acting pawl is in
neutral positiomas shown in Figs. 1 and 2. The
rollerfe? is adapted to move fromv the centralpor
permit free escape of air therefrom,‘and thereby
#tion upwardly into either of the slot portions V permitting the pressure in'piston housing 13 to
so. ‘d2 or (13. The loop dlris provided in the horizon
decrease. control pistonD will descend and as, a 392'
tally elongated top endjr of the cylindrical head result the ‘upper tooth of pawlE ,will be brought
1-1. The stem 11 of piston D, which is slidably into engagement with ratchet wheel F, turning
?tted in bushing y of casing B, is secured at its the same in the opposite direction’ (Fig. 4) . The
' 35.
upper end to the axial centerof the head r1, there
being an annular recess 11/1 in the lower portion of
said ,cylindricalhead to accommodate the bushing
y and permit vertical movement, of said cylindri
rcal head in accompaniment, with the vertical '
' movement of the_piston D. . By "means of the
40. central-shaft T'which is moved'with the move
condition illustrated in Fig. 4 is also an inter-7'v
mediate or changing one and in this case the air 3.5:.”
pressure within the piston housing is decreasing
since the escape‘of'air through the nozzle is more '
rapid than the supply-introduced through pipe’ '
b3. .Now, it requires ‘more air pressure to sustain n ,
the smaller piston D within the annular flange 0 401?
ment of the ratchet wheel'F, agate, valve, or than to push the'larger piston C to its lowermost.
similar device can be opened or closed in a man
position against the resistance of its'spring. This
ner well known in the ,art. ~
is due not only to the relative arrangement and
In- Fig. 1, the neutral position of the double the, relation of the parts but to the fact that the ‘
{acting pawl is shown, there being :no air supply’
piston C, as compared with piston D,’ has a much 45,2
available. Here.- the arresting piston C is shown ; larger area that is subject to air‘ pressure within
' in'its highest position, having been moved up by
the chamberrm. 'Therefore, as air pressure de
V ' the spring 01, with the control piston D sustained
creases within the housing,thesmallerpiston D.
‘in its-middle .or neutral position; Piston D is will descend to rest'upon piston C before piston‘
50 shown resting on pistongC, anarrangement which ‘ C is moved upwardly'by its spring to abut'the so;
' prevents the entry of air between the two pistons, lower end of the annular ?ange‘O. It will be‘.
and‘ this arrangement thereby keeps the pawl E obvious, that when the pawl is engaged with the
' ,in- its neutral, position as shown. With the air’ . ratchet wheel, any movement of the‘disk wheel
I pressuresupply through pipe-b3 shut off and the
W whieh‘carries the pawl, will be transmitted to,
55 feeler device a2 spaced from the nozzle b1, the air the ratchet wheel for operating the shaft T.’
pressure within chamber m‘ of the piston housing
'Itis obvious that the piston 'D, from its posi-f
is that of atmospheric pressure and‘this is in-' tion shown in Figure'Z, after its release by the is
su?icient; to overcomeeth'e- spring force which’ looking piston C, may move downward under its . '7
urges the larger piston C upwardly‘ against the
own'gravity if no resisting pressure. is present.
7 t
60 lower end of annular ?ange o.
In atmospheric ' In Figure 3 the control piston'Disunabl‘e tovmove
pressure, the spring resistance to the larger piston toward .the locking piston C when in its lower-' "
1C is su?icien-t to support the smallenpiston D. most position as shown, because in that case the.
"and when piston C abuts the lower end of ?ange full pressure of the pressure agent acts uponthe
o,'pist0n D within said ?ange is sustained in such piston D and presses the latter upward. If the; V ’
65, position thatit holds the pawl E in neutral posi
pressure of the pressure agente‘beco'mes less'in 651
' tion.
' consequence of the opening of the out?ow; or
'- Figs."2 to’ 4- show various relative; positions of
exhaust pipe 172, the piston D is able to move
the pistons with respect to each other during
operation. If pipe line b3 is underfair pressure,
downward under the in?uence of its ownr'wreight.
then due to' the air pressure that is built up in
chamber m, the arrestinggpiston Ciwill be forced
downward against the upward urge of spring 01,
It is' seen that at atmospheric pressure both
pistons are in contact, and the piston D is locked 70,
or held in position by the piston C.’ At. the’
highest pressure in the chamber m the'pis'ton C
thereby freeing control piston D" for action. -If' is moved against the spring action to itslower- '
float A is in its middle or neutral position '(Fig. 2) ' most position, and the piston D to its uppermost
:.~ and a certainv quantity of ‘air ?ows'through nozzle
position against the'action of gravity and against
the necessary forces to do the work intended.
Intermediate pressures cause the piston D to take
an intermediate position between the highest and
lowest positions.
In normal operating position, the air opening
2i is covered about half way by the sheet. The
which separate pistons, remote from each other
and uncombined, participated in the oscillation
of the ratchet wheel, the new combined piston
can new function in a single stationary housing.
15 The air hose formerly employed was subjected to
great wear inasmuch as the same moved with the
pistons‘, while under the new combined arrange
ment, ?xed air pipes can be provided. Inasmuch
as the device must often operate in dusty and
20 ' wet localities, the new control enclosed in a hous
ing and with only one actuating lever, functions
much better and with greater reliability.
Referring to Figs. 5, 6, and '7, the paper sheet
or felt it runs in the direction of the arrow X
25 'over regulator roll H which in a known manner
is adjustably supported by resting at one end in a
slide bearing I2, by means of which it can be
moved sidewise in either direction out of its nor
mal position, which is at right angles to the run
30 of the sheet.
The effect of this movement in the regulation
of wires or felts in paper-making or similar ma
chines is generally known.
The impulses for the
movement of the roll are derived from its own
35 rotary movement by means of crank I3 which,
through rod l4, acts upon swing lever I5, to which
is attached pawl is designed for action in both
directions of rotation.
In a manner to be ex
plained hereinafter, this pawl is according to
40 conditions caused to act either one way or the
other, causing a corresponding left hand or right
hand rotation of conical gear II in mesh with
conical gear I8, and, therefore, causes a corre
sponding rotation of spindle I9 so that slide bear
45 ing I2 of the guide roll can be moved either in
the direction in which the sheet is running or in
a counter-direction.
The actuation of the double pawl I6 is effected
by means of air nozzle feeler 20 positioned under
50 neath the edge of the sheet. This air nozzle
feeler 25 is provided with an air hole 2| forming
the ori?ce of air piping 22, which leads to the
piston housing 13 containing the combined pistons
C and D. If the sheet covers opening 2 I, the air
55 pressure will cause the control piston D to rise
machine frame.
The manner of operation of the device may be
described for example, as follows:
By this invention, a compact arrangement of
simpli?es the air supply lines, as will‘ be evident,
in guide rail ‘H which is ?rmly connected to the 7
the ratchet and control mechanism is accom
plished as to the two pistons which are com
bined in one housing. This arrangement greatly
10 in contrast to previously known arrangements in
~ 3
and thereby cause pawl It to engage and move
the ratchet 23 and hence the slide bearing and
guide roll in one direction. If, on the other hand,
the sheet recedes entirely from opening 2 I, the air
can escape from the opening which causes piston
D to fall and the other end of double acting pawl
It is in consequence brought into engagement
with the ratchet wheel to cause movement of the
roll in the opposite direction.
It is to be understood that the feeler piece 23
is not connected to the machine frame work but
is disposed so as to be adjustable transversely to
the run of the sheet. For this purpose, the pipe
shaped holder 22a is adjustably arranged in a
guide 24 which is ?xedly connected to slide bear
ing E2 of the guide roll. At its outer end, there
is a downwardly extending lever 25 which swings
about a fixed bearing 2s connected to slide bear
ing l2 and at its lower end said lever 25 is guided
double acting pawl I6 is in neutral position and ‘
slide bearing I2 of the regulating roll is at rest.
Now, if the sheet leaves its straight run, running
for instance sidewise in the direction of the ar 10
row Y, air opening 2i will be closed up, the pres
sure in the piston housing B in consequence
thereof building up and forcing control piston D'
to rise with the result that the slide bearing is
moved in the direction of the run of the sheet 15'
(arrow X). The slanting position of the guide
roll which is brought about by this operation
will in a known manner cause the sheet to re
turn to its normal run. At the same time, how
ever, the joint action of slant guide H and nozzle 20 Q
body 26 will move the latter outwardly so that
in the conjunction of nozzle andsheet, an effort;
is caused to re-establish the half covered posi
tion of opening 2 I, and after this is accomplished,
and due to the change in pressure, the double 25 Zr
acting pawl is moved into its neutral position
again, to give rise to an excess impulse for en
tirely freeing nozzle opening ZI which through
the full descent of piston D will cause the other
end of the double acting pawl to come into en
30 I.
gagement with the ratchet, thereby bringing
the slide bearing l2 back into its normal position.
Should the air supply fail for any reason, ar
resting piston C, due to the expansion of spring
01 will rise to its highest position with control 85
piston D sustained in its neutral position. By
preventing the entry of air through the supply
pipe, the double acting pawl will be retained in
its neutral position as will be evident.
of the air supply will, therefore, automatically 40
disengage the double acting pawl and free the
adjusting device of the guide roll for, hand oper
ation. When the pawl is in neutral position the
conical gear H may be operated by hand,- the
shaft of this conical gear having for this pur 45
pose an extension 2,? to which is ?xed a hand
wheel 28.
It will be evident that it is immaterial in which
way the regulating impulse is created and in
which manner the'impulse is transmitted to the 50
guide roll.v The present invention can to ad
vantage be used not only for rotating bands, but
particularly also for guiding the paper, as for
instance, when reeling it on the reel, reeling or
unreeling it on the re-reel, the winder, longitu 55
dinal cutter and for other similar purposes.
l. A control device for operative mechanism,
comprising a casing, pistons disposed in said
casing, face to face, with their piston rods ex 60
tending in opposite directions through and out
of said casing, a weighted member on one of said
piston rods for moving its piston in one direction,
yieldable means on the other piston rod for mov
ing its piston in the other direction said weighted 65
member and said yieldable means on said piston
rods normally urging the pistons towards each
other, a pressure fluid supply means connected
with said casing, for supplying the interior of
the casing with pressure fluid to act upon the 70
pistons and to move them against the action of
said weighted member and said yieldable means
to positions as far away from each other as pos
sible whenacted upon by the highest pressure of
the pressure ?uid, and means regulating the ex
'hau'st' of the pressure ?uid means to vary the’
3. A control device'for operative mechanism,
7 pressure in the casing, whereby the lower pres
comprising a casing having an annular wall vSepa
sures allow the moving of the weighted piston I rating a mainchamber from a central chamber 1
to intermediate positions from its position under
5&1 highest'pre‘ssure.
2. A control device'for operative mechanism,
the lower end of which at the lower end of said
wall is open and in direct communication with-5L?
the main chamber below it, movable pistonsiné
comprising a casing having an annular wall s'epa-' dividualto said chambers, yieldable means nor
rating a'main chamber from ‘a central chamber mally‘ urging" the piston in the main chamber 7‘
the lower end of which'at the lower end of said ’ upwardly in engagement with the lower end of "
loiwall is open‘ and in direct communicationwith ' said wallgand for the support of the piston in the 10 TV
central-chamber at atmospheric pressure within
‘ the main chamber below it, movable pistons in
dividual to said chambers, yieldable means nor
the main chamber, a pressure ?uid supply. a
mally urging the piston in the main chamber means, an exhaust pressure ?uid 'means, each‘
upwardly in engagementwith the lower end of means'being connected with said’ main'chamber,‘ '7
162 said wall and for the support of the piston in the
ce tral'chamber atiatmospheric pressure within
th a main chamber, a pressure ?uid supply
" means for supplying the interior of the i casing
means regulating the exhaust of the exhaust pres-; ‘15?.
sure ?uid means, wherebythe pressure inthe
main chamber is varied from the highest to
atmospheric pressure therein, the highest pres
with pressure ‘fluid, an exhaust pressure ?uid ' sure'forcing both pistons as far away from each, 7
other as possible, and‘ the lower pressures vper- 2013
theinterior of said'main chamber, and means mitting the central ‘chamber piston to take inter-Q , l
. , 20;?means, each of said meansbeing connected with
,i'egulating'the exhaust of the exhaust pressure
mediate-relative positions between its highest and
?uid, means, whereby’ the pressure in the main
lowest positions, a stem on the central-chamber
chamber is varied from the highest to atmos
piston extending from‘ the casing, ratchet and
25>ipherici pressure therein, the highest pressure‘
pawl mechanism ' exterior to the casing,v .and >25:
forcing both pistons as far away from each other ,,means connecting said'stem and pawl adapted“ ~
as possible, and the lower pressures allowing the 7 to swing the pawl into engagement with the
moving of the central chamber piston to inter
mediate relative positions between its highest
80’iand lowest positions.
ratchet on the elevating movement of the’cen; ’
tral chamber piston.
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